The oldest pictographs on this decorated rock formation in California's Carrizo Plain date back as many as 4,000 years.

Three bronze deer sculptures relax along the Scioto Mile.

This ancient Irish landscape boasts hundreds of legendary ruins.

The oldest still-operating tavern in the United States was once owned by a pirate.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

An abandoned vacation home spent a decade taking on legends. It's now taking on water.

More than 1,000 stone figures were discovered in a small Nigerian town, where they had been sitting for centuries.

This little-used trail winds through the highest mountain range in central Nevada with sections around 10,000 feet.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

Located in a Civil War era building, this café is engrained with the spirit of Edgar Allen Poe.

A self-built castle made by a mysterious man.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

It's believed Matilda Fitzwalter's life was the basis for the famed literary figure.

This island castle contains enough secret passageways to support a season of Scooby-Doo episodes.

The remains of this rugged homestead ranch offer a brief glimpse into a bygone era.

Experience what life was like in Ireland during the Viking and medieval ages.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

Petroglyphs, bird watching, and a 100-year-old Ranch in one location.

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

The oldest library in Scotland was built from the remains of a church to hold a churchman's library.